This brief presents evidence on coverage and financing gaps for universal social protection (USP), offering actionable recommendations for FfD4. The ILO estimates that to ensure at least a social protection floor, low- and middle-income countries require an additional investment of US$ 1.4 trillion (3.3 per cent of the aggregate GDP) of these countries. To close the financing gap countries must increase investment in social protection, raising effective coverage by 2 percentage points annually (SDG indicator 1.3.1). At the international level, debt relief should move at a faster pace and access to international emergency financing must be enhanced to enable regular investment in USP in a climate-volatile world and avoid repeated rounds of austerity.